The full error message is:
Exception: java.lang.Exception: Version mismatch detection error flsx.jar/flsx.dll.
Please ensure these files are matched [dll=4.7.1 jar=4.7.2]
This is a known issue with release 4.7.2 of the Signature SDK for Windows when used with 64-bit Java.
To resolve the problem please download the latest release of the SDK under "Signature" at https://developer.wacom.com/en-us/developer-dashboard
If you are still having problems please click the "Submit a request" link at the top of this page to report the problem to the support team.